Simply put, I am extremely pleased by both of these power supplies since they performed admirably in our every single one of our performance tests. Antec and Silverstone have a lot to be proud of since they have produced some of the highest quality power supplies I have seen in a long time. Yet, particular credit needs to go to the team over at Antec whose Quattro 850W stole our hearts with its bold styling while besting the more expensive Silverstone in nearly all of the tests (although it was an extremely narrow win in the voltage regulation category).